include/linux/dnotify.h

   1 #ifndef _LINUX_DNOTIFY_H
   2 #define _LINUX_DNOTIFY_H
   3 /*
   4  * Directory notification for Linux
   5  *
   6  * Copyright (C) 2000,2002 Stephen Rothwell
   7  */
   8
   9 #include <linux/fs.h>
  10
  11 struct dnotify_struct {
  12         struct dnotify_struct * dn_next;
  13         unsigned long           dn_mask;
  14         int                     dn_fd;
  15         struct file *           dn_filp;
  16         fl_owner_t              dn_owner;
  17 };
  18
  19 #ifdef __KERNEL__
  20
  21 #include <linux/config.h>
  22
  23 #ifdef CONFIG_DNOTIFY
  24
  25 extern void __inode_dir_notify(struct inode *, unsigned long);
  26 extern void dnotify_flush(struct file *, fl_owner_t);
  27 extern int fcntl_dirnotify(int, struct file *, unsigned long);
  28 extern void dnotify_parent(struct dentry *, unsigned long);
  29
  30 static inline void inode_dir_notify(struct inode *inode, unsigned long event)
  31 {
  32         if (inode->i_dnotify_mask & (event))
  33                 __inode_dir_notify(inode, event);
  34 }
  35
  36 #else
  37
  38 static inline void __inode_dir_notify(struct inode *inode, unsigned long event)
  39 {
  40 }
  41
  42 static inline void dnotify_flush(struct file *filp, fl_owner_t id)
  43 {
  44 }
  45
  46 static inline int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
  47 {
  48         return -EINVAL;
  49 }
  50
  51 static inline void dnotify_parent(struct dentry *dentry, unsigned long event)
  52 {
  53 }
  54
  55 static inline void inode_dir_notify(struct inode *inode, unsigned long event)
  56 {
  57 }
  58
  59 #endif /* CONFIG_DNOTIFY */
  60
  61 #endif /* __KERNEL __ */
  62
  63 #endif /* _LINUX_DNOTIFY_H */